Talk:Angeloid/@comment-151.236.240.45-20140924185132/@comment-37.136.62.55-20150213061401

This is explained in DBZ and further in GT: Other humans aside from Dr. Gero are incapable of creating androids. Dr. Gero is considered a super genius so that makes him special, a 1 in a million chance of a mutant. Dr. Gero is actually one of the smartest characters in the whole show techologically speaking. (In alternate time line Bulma made a time machine, not a counter android so we should just assume she wasn't able to make an android, or even a weapon, and his dad ultimately copied Goku's pod and although he built an intergalactic space ship the feat thus wasn't without outside help. So the capsule and its weight-bypass is probably his greatest feat).

Gero's smarts are further evidenced in GT when AN ANDROID SCIENTIST FROM SPACE HOLY SHT!!! teamed up with him to make super 17. And that android scientist was actually impressed by Gero's technology which makes Gero at least equal, if not smarter since they eventually used Gero's android.

TL;DR: Dr. Gero is a mutant and is far above in technology and intelligence compared to other humans and most of the universe. Other humans are not nearly as smart.